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Finding the Fourth Proportional to 42,410.60, 63,615.90 and 20,234.60

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Solution

The fourth proportional to 42,410.60, 63,615.90 and 20,234.60 is: 30,351.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,410.60 : 63,615.90 = 20,234.60 : x
  2. Step 2: Convert to fraction form
    42,410.60/63,615.90 = 20,234.60/x
  3. Step 3: Cross multiply
    42,410.60x = 63,615.90 × 20,234.60
  4. Step 4: Simplify right side
    42,410.60x = 1,287,242,290.14
  5. Step 5: Solve for x
    x = 1,287,242,290.14/42,410.60
  6. Step 6: Final answer
    x = 30,351.90

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.